hacker-rank

This is a repository of my solutions to Hacker Rank problems.

Languages

Currently, I have solutions written in

• Python 2 and 3
• Javascript
• Java
• C++
• SQL

How to Run the Code

Python

You can run the python code in either python 2 or 3 for most projects, though python 3 support has priority. You can run a package by invoking python on a directory that contains a __main__.py file. For example,

python python_song_of_pi/

Running Tests

You will need to install the dependencies in the requirements.txt file. This includes pytest and pytest-sugar. With those installed, you can run all tests in all subdirecties with the command

py.test

Javascript

The javascript scripts can be run from the main.js file. You will need nodejs to run these files and you can run them with the command

node main.js

Running Tests

You will need to have mochajs installed. With npm installed, you can do this with the following command.

npm install -g mocha

From there, you can run all tests with the command

mocha **/test.js

If you are with a directory with a test file, you can simply run the mocha command to run tests from just that module.

Coffeescript

You can run the coffeescript solutions by running the following command from the root directory of the coffeescript solution.

coffee src/main.coffee

Running the Tests

You will need to have coffee-script installed locally and mocha installed. You can them run the tests from the root directory off the coffeescript solution.

mocha --compilers coffee:coffee-script/register

C++

You can run the C++ code by using the CMake build system. A CMakeLists.txt file is supplied for each solution and a vew top level CMakeLists.txt files that allow you to build all of the C++ solutions from the C++ subdirectory.

Compiling the Solutions

You must have a C++ compiler and CMake set up on your system. Then run the following commands from the C++ subdirectory.

mkdir build && cd build && cmake .. && make

You might need to use a different toolchain depending on which compiler you are using and which operating system you are on.

Java

You will need a Java compiler and Gradle installed on your system. You can navigate to a directory containing a build.gradle file and run the code with the gradle run command. Note that you can use quiet mode with gradle to remove the gradle stdout output. To do this add the -q flag. Ex: gradle -q run.

Running the Tests

Some of the Java solutions have tests written for them. You can run these tests with either the commands gradle test or gradle build. If the tests fail, you will see output telling you which tests failed. If no tests failed, there will be no output.